Neptunite and Dravite Physical Properties

Neptunite

Dravite

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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

Brittle

3.19-3.23

Conchoidal

{110} good

5-6

KNa 2Li(Fe2+ ,Mn2+ ) 2Ti 2Si 8O 24Michael OâDonoghue , Gems, Sixth Edition (2006)

3.03-3.18

Uneven, Irregular, Conchoidal

{???} Indistinct

7-7.5

Na(Mg 3)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)

Neptunite and Dravite Chemical Formula

While comparing Neptunite and Dravite physical properties, the important data you should know is its chemical composition. Since chemical formula defines the molecular structure of the crystal, most of the physical properties like color, tenacity, solubility are governed by Neptunite and Dravite chemical formula.

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Neptunite and Dravite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Neptunite and Dravite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Neptunite Vs Dravite during the identification of gemstone. Specific gravity of Neptunite is whereas that of Dravite is .